报道了一种室温条件下工作的高功率激光二极管(LD)端面抽运Yb∶YAG板条双波长激光放大器, 稳定的双波长运转在1029.6, 1031.5 nm。基于Yb∶YAG宽带荧光特性, 建立了双波长放大模型, 通过数值模拟研究了不同抽运条件下激光光谱放大输出特性。通过940 nm激光二极管双端抽运Yb∶YAG晶体, 拥有双波长光谱的种子光从晶体一端注入并进行放大。实验结果表明,在1.18 kW注入时获得了6.56 kW的双波长连续激光输出, 与数值模拟结果相吻合。双波长激光放大理论和实验研究为进一步实现高功率光谱合成等应用奠定了基础。

This paper reports a laser diode (LD) end-pumped Yb∶YAG slab dual-wavelength laser amplifier with high power working at room temperature. The dual-wavelength stably operates at 1029.6, 1031.5 nm. Based on the broadband fluorescence characteristic of Yb∶YAG, the dual-wavelength amplification model is built and corresponding numerical simulation is taken to study the laser spectrum amplification output properties under different pump conditions. 940 nm laser diodes is used to pump the Yb∶YAG crystal at two ends. The seed laser with the dual-wavelength spectrum is injected from one end of the crystal and amplified. Experimental results show that continuous-wave (CW) dual-wavelength laser output power of 6.56 kW is acquired when the seed injection is 1.18 kW, which matches the simulation results. These theoretical and experimental researches of dual-wavelength laser amplification can lay the foundation for the applications such as high-power spectral combination, etc.